Time or spatial domain beam prediction systems

Abstract

A first UE may receive an indication to operate in at least one of a TD beam prediction mode or an SD beam prediction mode. The indication may be received from a first network entity. A second UE may obtain side information associated with the second UE for at least one of the TD beam prediction mode or the SD beam prediction mode. The second UE may transmit the side information associated with the second UE. The first UE may receive the side information from at least one of the first network entity, the second UE, or a second network entity. The first UE may estimate, based on the side information, one or more channel characteristics for a first set of DL RSs based on at least one of the TD beam prediction mode or the SD beam prediction mode.

What is claimed is: 
     
         1 . An apparatus for wireless communication at a first user equipment (UE), comprising:
 a memory; and   at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:
 receive an indication to operate in at least one of a time domain (TD) beam prediction mode or a spatial domain (SD) beam prediction mode, wherein the indication is received from a first network entity; 
 receive side information associated with a second UE, wherein the side information is received from at least one of the first network entity, the second UE, or a second network entity; and 
 estimate, based on the side information, one or more channel characteristics for a first set of downlink (DL) reference signals (RSs) based on at least one of the TD beam prediction mode or the SD beam prediction mode. 
   
     
     
         2 . The apparatus of  claim 1 , wherein the first network entity comprises a base station or a component of the base station, and the second network entity comprises a location management function (LMF) or a component of the LMF. 
     
     
         3 . The apparatus of  claim 1 , wherein the at least one processor is further configured to:
 receive a second set of DL RSs from the first network entity for at least one of the TD beam prediction mode or the SD beam prediction mode; and   perform at least one measurement for the second set of DL RSs in at least one of the TD beam prediction mode or the SD beam prediction mode, wherein estimating the one or more channel characteristics for the first set of DL RSs is further based on the at least one measurement for the second set of DL RSs.   
     
     
         4 . The apparatus of  claim 1 , further comprising a transceiver coupled to the at least one processor wherein the at least one processor is further configured to receive a prediction model from a third network entity via the transceiver, wherein estimating the one or more channel characteristics for the first set of DL RSs comprises applying the prediction model to the side information to predict the one or more channel characteristics for the first set of DL RSs. 
     
     
         5 . The apparatus of  claim 1 , wherein the at least one processor is further configured to:
 transmit an indication of the estimation of the one or more channel characteristics for the first set of DL RSs.   
     
     
         6 . The apparatus of  claim 1 , wherein the side information associated with the second UE is received via at least one of a radio resource control (RRC) configuration, a medium access control (MAC) control element (MAC-CE), or downlink control information (DCI) from the first network entity. 
     
     
         7 . The apparatus of  claim 1 , wherein the side information associated with the second UE comprises at least one of: (a) one or more historical characteristics of a second set of DL RSs, (b) one or more predicted characteristics of a third set of DL RSs, (c) a first channel profile between the second UE and the first network entity, (d) a second channel profile between the second UE and the first UE, (e) position information, (f) location information, or (g) mobility information. 
     
     
         8 . The apparatus of  claim 7 , wherein the one or more historical characteristics or the one or more predicted characteristics include at least one of: a reference signal received power (RSRP) measurement, a reference signal (RS) identifier (RS-ID), a measurement time period, a beam failure condition, or a beam blockage condition. 
     
     
         9 . The apparatus of  claim 7 , wherein the first channel profile comprises at least one of a packet data protocol (PDP), a first angle of arrival (AoA), or a first resource, and wherein the second channel profile comprises at least one of a sidelink PDP, a second AoA, or a second resource. 
     
     
         10 . The apparatus of  claim 1 , wherein the side information is received via a sidelink transmission from the second UE. 
     
     
         11 . The apparatus of  claim 1 , wherein the side information associated with the second UE comprises at least one of position information, location information, or mobility information received from the second network entity. 
     
     
         12 . The apparatus of  claim 11 , wherein the at least one of the position information, the location information, or the mobility information includes at least one of second position information, second location information, or second mobility information of a set of UEs, wherein the set of UEs comprises the second UE. 
     
     
         13 . The apparatus of  claim 1 , wherein the side information associated with the second UE comprises a long term evolution (LTE) positioning protocol (LPP) transmission received from the second network entity. 
     
     
         14 . The apparatus of  claim 1 , wherein the at least one processor is further configured to:
 receive a decoder from the first network entity; and   decompress, based on the decoder, the side information received from the first network entity or the second UE.   
     
     
         15 . The apparatus of  claim 1 , wherein the at least one processor is further configured to:
 receive an encoder from the first network entity; and   decompress, based on the encoder, the side information received from the first network entity or the second UE.   
     
     
         16 . The apparatus of  claim 1 , wherein the side information is received as a broadcast transmission or a multi-cast transmission from the first network entity or from the second UE. 
     
     
         17 . An apparatus for wireless communication at a second user equipment (UE), comprising:
 a memory; and   at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:
 obtain side information associated with the second UE for at least one of a time domain (TD) beam prediction mode or a spatial domain (SD) beam prediction mode; and 
 transmit the side information associated with the second UE. 
   
     
     
         18 . The apparatus of  claim 17 , further comprising a transceiver coupled to the at least one processor wherein the at least one processor is further configured to:
 receive an indication to transmit the side information from a first network entity via the transceiver, wherein the indication to transmit the side information is received periodically, semi-periodically, or aperiodically.   
     
     
         19 . The apparatus of  claim 17 , wherein the at least one processor is further configured to transmit an indication of broadcasting or multi-casting a sidelink transmission comprising the side information to a first UE. 
     
     
         20 . The apparatus of  claim 17 , wherein the side information comprises at least one of: (a) one or more historical characteristics of a first set of DL RSs, (b) one or more predicted characteristics of a second set of DL RSs, (c) a first channel profile between the second UE and a first network entity, (d) a second channel profile between the second UE and a first UE, (e) position information, (f) location information, or (g) mobility information. 
     
     
         21 . The apparatus of  claim 20 , wherein the one or more historical characteristics or the one or more predicted characteristics include at least one of a reference signal received power (RSRP) measurement, a reference signal (RS) identifier (RS-ID), a measurement time period, a beam failure condition, or a beam blockage condition. 
     
     
         22 . The apparatus of  claim 20 , wherein the first channel profile comprises at least one of a packet data protocol (PDP), a first angle of arrival (AoA), or a first resource, and wherein the second channel profile comprises at least one of a sidelink PDP, a second AoA, or a second resource. 
     
     
         23 . The apparatus of  claim 17 , wherein the side information is transmitted via a sidelink transmission to a first UE. 
     
     
         24 . The apparatus of  claim 17 , wherein the side information is transmitted via an uplink transmission to a first network entity. 
     
     
         25 . The apparatus of  claim 17 , wherein the at least one processor is further configured to:
 receive an indication of an estimate of one or more first channel characteristics for a first set of DL RSs based on at least one of the TD beam prediction mode or the SD beam prediction mode.   
     
     
         26 . The apparatus of  claim 25 , wherein the at least one processor is further configured to:
 receive a prediction model from a third network entity; and   estimate one or more channel characteristics for a second set of DL RSs by applying the prediction model to the estimate of the one or more first channel characteristics.   
     
     
         27 . The apparatus of  claim 17 , wherein the at least one processor is further configured to:
 receive an encoder from a first network entity; and   compress the side information based on the encoder.   
     
     
         28 . The apparatus of  claim 17 , wherein the second UE comprises a road side unit (RSU) or a smart repeater. 
     
     
         29 . A method of wireless communication at a first user equipment (UE), comprising:
 receiving an indication to operate in at least one of a time domain (TD) beam prediction mode or a spatial domain (SD) beam prediction mode, wherein the indication is received from a first network entity;   receiving side information associated with a second UE, wherein the side information is received from at least one of the first network entity, the second UE, or a second network entity; and   estimating, based on the side information, one or more channel characteristics for a first set of downlink (DL) reference signals (RSs) based on at least one of the TD beam prediction mode or the SD beam prediction mode.   
     
     
         30 . A method of wireless communication at a second user equipment (UE), comprising:
 obtaining side information associated with the second UE for at least one of a time domain (TD) beam prediction mode or a spatial domain (SD) beam prediction mode; and   transmit the side information associated with the second UE.